Eric is a Python IDE written using PyQt and QScintilla. It provides various features such as any number of open editors, an integrated (remote) debugger, project management facilities, unit test, refactoring and much more.

QuickFIX is the worlds first Open Source C++ FIX (Financial Information eXchange) engine, helping financial institutions easily integrate with each other.
The SVN repository is now locked. Latest code is hosted at github.
https://github.com/quickfix/quickfix

WideStudio is an Integrated Development Environment (IDE) for building window applications in C++, Ruby, Python an Perl for Windows, MacOSX, Linux, FreeBSD, SOLARIS and other unix and BTRON and T-Engine. This is open and free (under MIT/X Consortiun Lice

RogueScanner is a network security tool for automatically discovering rogue wireless access points by scanning a wired network. In addition to finding access points, it will classify all discovered network devices

The NERO Character Creator is a tool designed to create and track your NERO International characters. Keep track of your character's build, experience history, formal effects, and backstory all in one easy-to-use application.

** Project moved to https://github.com/NREL/legacy-openstudio/ **
The Legacy OpenStudio SketchUp Plug-in makes it easy to create and edit the building geometry in your EnergyPlus input files. Note that active development has moved to the more comprehensive OpenStudio suite of tools and libraries at https://www.openstudio.net/.

ModMgr is a (Windows) tool that manages and automatically swaps mods for the Sid Meier's Pirates! game.
ModMaker allows you to create mods easily and quickly from premade clothing and bodyparts. It's a bit like putting new outfits on paper dolls.

A small tool developed in Ruby (using FOX GUI toolkit) that helps changing environment variables in windows; It presents the user with a more confortable interface than found in Control Panel - System. Yet Another Windows Environment Editor.

ns_ruby is a loadable AOLserver module which embeds a Ruby interpreter. It is developed with the intention of exposing all of the features of AOLserver to Ruby, namely kernel threads, a unified cache, .adp templating, and database connection pooling.